Extending the Photovoltaic Response of Perovskite Solar Cells into the Near‐Infrared with a Narrow‐Bandgap Organic Semiconductor
Abstract
Abstract Typical lead‐based perovskites solar cells show an onset of photogeneration around 800 nm, leaving plenty of spectral loss in the near‐infrared (NIR). Extending light absorption beyond 800 nm into the NIR should increase photocurrent generation and further improve photovoltaic efficiency of perovskite solar cells (PSCs). Here, a simple and facile approach is reported to incorporate a NIR‐chromophore that is also a Lewis‐base into perovskite absorbers to broaden their photoresponse and increase their photovoltaic efficiency. Compared with pristine PSCs without such an organic chromophore, these solar cells generate photocurrent in the NIR beyond the band edge of the perovskite active layer alone. Given the Lewis‐basic nature of the organic semiconductor, its addition to the photoactive layer also effectively passivates perovskite defects. These films thus exhibit significantly reduced trap densities, enhanced hole and electron mobilities, and suppressed illumination‐induced ion migration. As a consequence, perovskite solar cells with organic chromophore exhibit an enhanced efficiency of 21.6%, and substantively improved operational stability under continuous one‐sun illumination. The results demonstrate the potential generalizability of directly incorporating a multifunctional organic semiconductor that both extends light absorption and passivates surface traps in perovskite active layers to yield highly efficient and stable NIR‐harvesting PSCs.
- Authors:
-
[5]
- Department of Chemical and Biological Engineering Princeton University Princeton NJ 08544 USA
- Department of Chemical and Biological Engineering Princeton University Princeton NJ 08544 USA, School of Advanced Materials Peking University Shenzhen Graduate School Shenzhen 518055 China
- Princeton Institute for Science and Technology of Materials Princeton University Princeton NJ 08544 USA
- School of Advanced Materials Peking University Shenzhen Graduate School Shenzhen 518055 China
- Department of Chemical and Biological Engineering Princeton University Princeton NJ 08544 USA, Andlinger Center for Energy and the Environment Princeton University Princeton NJ 08544 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1562157
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Advanced Materials
- Additional Journal Information:
- Journal Name: Advanced Materials Journal Volume: 31 Journal Issue: 49; Journal ID: ISSN 0935-9648
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Zhao, Xiaoming, Yao, Chao, Liu, Tianran, Hamill, Jr., J. Clay, Ngongang Ndjawa, Guy Olivier, Cheng, Guangming, Yao, Nan, Meng, Hong, and Loo, Yueh‐Lin. Extending the Photovoltaic Response of Perovskite Solar Cells into the Near‐Infrared with a Narrow‐Bandgap Organic Semiconductor. Germany: N. p., 2019.
Web. doi:10.1002/adma.201904494.
Zhao, Xiaoming, Yao, Chao, Liu, Tianran, Hamill, Jr., J. Clay, Ngongang Ndjawa, Guy Olivier, Cheng, Guangming, Yao, Nan, Meng, Hong, & Loo, Yueh‐Lin. Extending the Photovoltaic Response of Perovskite Solar Cells into the Near‐Infrared with a Narrow‐Bandgap Organic Semiconductor. Germany. https://doi.org/10.1002/adma.201904494
Zhao, Xiaoming, Yao, Chao, Liu, Tianran, Hamill, Jr., J. Clay, Ngongang Ndjawa, Guy Olivier, Cheng, Guangming, Yao, Nan, Meng, Hong, and Loo, Yueh‐Lin. Mon .
"Extending the Photovoltaic Response of Perovskite Solar Cells into the Near‐Infrared with a Narrow‐Bandgap Organic Semiconductor". Germany. https://doi.org/10.1002/adma.201904494.
@article{osti_1562157,
title = {Extending the Photovoltaic Response of Perovskite Solar Cells into the Near‐Infrared with a Narrow‐Bandgap Organic Semiconductor},
author = {Zhao, Xiaoming and Yao, Chao and Liu, Tianran and Hamill, Jr., J. Clay and Ngongang Ndjawa, Guy Olivier and Cheng, Guangming and Yao, Nan and Meng, Hong and Loo, Yueh‐Lin},
abstractNote = {Abstract Typical lead‐based perovskites solar cells show an onset of photogeneration around 800 nm, leaving plenty of spectral loss in the near‐infrared (NIR). Extending light absorption beyond 800 nm into the NIR should increase photocurrent generation and further improve photovoltaic efficiency of perovskite solar cells (PSCs). Here, a simple and facile approach is reported to incorporate a NIR‐chromophore that is also a Lewis‐base into perovskite absorbers to broaden their photoresponse and increase their photovoltaic efficiency. Compared with pristine PSCs without such an organic chromophore, these solar cells generate photocurrent in the NIR beyond the band edge of the perovskite active layer alone. Given the Lewis‐basic nature of the organic semiconductor, its addition to the photoactive layer also effectively passivates perovskite defects. These films thus exhibit significantly reduced trap densities, enhanced hole and electron mobilities, and suppressed illumination‐induced ion migration. As a consequence, perovskite solar cells with organic chromophore exhibit an enhanced efficiency of 21.6%, and substantively improved operational stability under continuous one‐sun illumination. The results demonstrate the potential generalizability of directly incorporating a multifunctional organic semiconductor that both extends light absorption and passivates surface traps in perovskite active layers to yield highly efficient and stable NIR‐harvesting PSCs.},
doi = {10.1002/adma.201904494},
journal = {Advanced Materials},
number = 49,
volume = 31,
place = {Germany},
year = {Mon Sep 16 00:00:00 EDT 2019},
month = {Mon Sep 16 00:00:00 EDT 2019}
}
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